نتایج جستجو برای: water and salinity limitations
تعداد نتایج: 16937283 فیلتر نتایج به سال:
In order to study the effect of salinity on dry mass production of linseed at vegetative phase and the effects of water deficit on some agronomics, grain yield, seed oil and protein content of six linseed genotypes two experiments were carried out in 2012. In pot experiment, four levels of NaCl salt including 0 (control), 35 (moderate salinity), 70 (high salinity) and 105 mM (severe salinity) w...
the present investigation provides a thorough study of eliminating soluble and colloidal elements of copper, iron, magnesium and zinc during estuarine mixing of gorganrood river water with caspian sea water in iran. the processes of flocculation were carried out in 10 aquariums in order to furnish the salinity in an interval of 0.3 - 4.4 ppt. the obtained result is indicative of non- conservati...
Salinity stress is one of the most important problems of arid and semi-arid regions in the world. Based on Food and Agriculture Organization report, more than 40% of Iran’s under Irrigation lands, are against secondary salinity. The effects of salinity stress on some of vegetative traits and water relations on two rangeland plants species of leguminosae family was the main objective of this exp...
background: although borage ( borago officinalis l.) is a valuable medicinal plant, no information is available on the responses of this plant to salinity. for this reason, it is necessary to determine responses of this plant to salinity . objective: since germination and early growth stage is one of the most critical phases of plant life under salinity condition this experiment was conducted ...
the neogene intrusion masses in the noudeh-enghelab area located to the north of sabzevar ophiolite have cut the late cretaceous ophiolitic rocks, sedimentary- volcanic and eocene volcanic rocks and have been covered by pliocene and quaternary deposits. the margin is of lava with basalt, phyric andesite-basalt and andesite and the central parts (dome shaped) composed of phyric andesite-trachyan...
introduction increasing world population is facing critically depletion of water resources, which will be along with increasing food demands to cover the human needs all over the world. therefore, water scarcity is increasingly a major limitation for increased agricultural production and food security in this century. the scarcity of qualified water, has made farmers to consider the water of ma...
A change in the cycle of water from dry to wet regions of the globe would have far reaching impact on humanity. As air warms, its capacity to hold water increases at the Clausius-Clapeyron rate (CC, approximately 7% °C-1). Surface ocean salinity observations have suggested the water cycle has amplified at close to CC following recent global warming, a result that was found to be at odds with st...
Water, salinity and nitrogen are the major factors affecting maize production in arid and semi-arid areas. The objectives of this study were to investigate the effects of different water, salinity and nitrogen levels on yield-water relationships, water use, water productivity (WP), water use efficiency (WUE) and water uptake reduction function by maize hybrid SC-704 in a semi-arid area and ...
the effects of sodium chloride (nacl) salinity (control; canal water with 0.4 ds m-1), 2.5 dsm-1, 5.0 ds m-1, 7.5 ds m-1 and 10.0 ds m-1, respectively) developed after 6 weeks of pruning (beginning of study) on plant growth, flowering and quality of three cut rose (rosa hybrida l.) cultivars viz. ‘kardinal’, ‘angelique’ and ‘gold medal’ were studied to achieve better management, quality product...
cultural iran is a scope that is more extended than the political territories of iran as a political unit. this concept means that cultural geography(mehdi moghanlo-1383-1) of iran is greater than its political geography which, according to history, has a long history extending west-east from kandahar to the euphrates and north-south from the persian gulf to the caucasus including transoxiana a...
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